Question about HEWLETT PACKARD - LASER JETS HP LaserJet Pro 400 M401DN Laser Printer - Monochrome - 1200 x 12
Receiving 79 Service Error
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Posted on Jan 02, 2017
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Aug 03, 2014 | HP LaserJet 4mv Printer
An incompatible DIMM is installed.
Turn the product power off.
Install a DIMM that the product supports.
Turn the product on.
If the message persists, contact HP support.
Dec 28, 2013 | HP LaserJet Pro 400 M401DN Laser Printer
Sep 16, 2013 | HP LaserJet Pro 400 MFP M425dn
Software/drivers, Memory PCA's,
Font-Macro-Personality Cartridges, option I/O Cards. Defective toner cartridge
in the Laserjet 4 Plus only. Remove any accessories (font cartridges,
memory PCA's, SIMMs, etc.) plugged into the formatter card and try again. If
the problem persists and is application specific, verify proper setup with
Defective Formatter PCA - Replace with
known operational board and try again.
Firmware Update - The configuration page lists the firmware version of the product. Depending on the model, a firmware DIMM may need replacing or a flash update. On flash-memory-based products, you can update the firmware code by downloading the latest flash executable file for the product and running the program according to the readme instructions posted with the update file. If the firmware should become corrupted or fail (usually because of an interruption when attempting to update the firmware), the product will no longer function. In this case, a firmware recovery DIMM is available.
Reseat DIMM, then Formatter - Replace or flash DIMM then formatter
Can this also be?
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Turn off then on
The device has experienced an internal
Turn off the power by using the power
switch, wait at least 30 seconds, and then
turn on the power and wait for the device to
If you have recently installed a memory
DIMM in the device, turn off the device,
remove the memory DIMM, reinstall the
DIMM to verify that it is seated properly,
and then turn on the device.
If a surge protector is being used, remove
it. Plug the device directly into the wall
socket. Use the power switch to turn the
If the error persists, upgrade the firmware.
See Updating or recovering the firmware
If the error persists, replace the formatter.
See Removing the formatter assemblies
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